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Allium unifolium

Allium unifolium

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Ordo: Asparagales

Familia: Amaryllidaceae
Subfamilia: Allioideae
Tribus: Allieae
Genus: Allium
Subgenus: A. subg. Amerallium
Sectio: A. sect. Lophioprason
Subsectio: A. subsect. Acuminata
Species: Allium unifolium

Allium unifolium Kellogg, 1863

Allium grandisceptrum Davidson
Allium unifolium Vieill. ex Greene, nom. illeg.
Allium unifolium var. lacteum Greene

Native distribution areas:

Continental: Northern America
California; Mexico Northwest; Oregon

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition

Kellogg, A., Proceedings of the California Academy of Sciences 2:112, fig. 35. 1863


Govaerts, R. et al. 2018. Allium unifolium in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2018 Jul. 25. Reference page.
International Plant Names Index. 2018. Allium unifolium. Published online. Accessed: Jul. 25 2018.
USDA, ARS, Germplasm Resources Information Network. Allium unifolium in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 08-Apr-12.

Vernacular names
English: oneleaf onion

Allium unifolium, the one-leaf onion or American garlic,[4] is a North American species of wild onion. It is native to the coastal mountain ranges of California, Oregon, and Baja California.[1] It grows on clay soils including serpentine, at elevations up to 1100 m.[5][6]

Allium unifolium, despite its name, usually has 2-3 flat leaves up to 50 cm long. Bulbs, though, are usually solitary, egg-shaped, up to 2 cm long, often formed at the end of rhizomes spreading out from the parent plant. Scapes are round in cross-section, up to 80 cm tall. Flowers are up to 15 mm across; tepals usually pink but occasionally white; anthers yellow or purple.[5][7][8][9]

This plant has gained the Royal Horticultural Society's Award of Garden Merit.[10]

Kew World Checklist of Selected Plant Families
The Plant List
BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
Flora of North America, v 26 p 258
Calflora taxon report 240, Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. Allium unifolium
Hickman, J. C. 1993. The Jepson Manual: Higher Plants of California 1–1400. University of California Press, Berkeley.
Kellogg, Albert. 1863. Proceedings of the California Academy of Sciences 2: 112, f. 35.
Hitchcock, C. H., A.J. Cronquist, F. M. Ownbey & J. W. Thompson. 1969. Vascular Cryptogams, Gymnosperms, and Monocotyledons. 1: 1–914. In C. L. Hitchcock Vascular Plants of the Pacific Northwest. University of Washington Press, Seattle.
"RHS Plantfinder - Allium unifolium". Royal Horticultural Society. 2002. Retrieved 5 January 2018.

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